Biology, 2018, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2018

Title :

Biology

Exam :

JAMB Exam

Paper 1 | Objectives

81 - 90 of 90 Questions

#	Question	Ans
81.	Swollen, bleeding gums are another common sign of which vitamin A. Vitamin K B. Vitamin B C. Vitamin C D. Vitamin D Show Content Detailed Solution vitamin C deficiency can occur as part of general under nutrition, but severe deficiency result into causing scurvy. Symptoms include fatigue, depression, and connective tissue defects (eg, gingivitis, petechiae, rash, internal bleeding, impaired wound healing). There is an explanation video available below.	C
82.	Double fertilisation is a unique features of A. Angiosperms B. Bryophytes C. Pteridophytes D. Algae Show Content Detailed Solution Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (mega gametophyte, also called the embryo sac) with two male gametes (sperm). There is an explanation video available below.	A
83.	The gland that is present close to Trachea A. Pancreas B. Liver C. Adrenal D. Thyroid Show Content Detailed Solution The thyroid gland, along with the esophagus, pharynx, and trachea, is found within the visceral compartment of the neck There is an explanation video available below.	D
84.	A distinguishing feature of mammals is the possession of A. Skin B. Scale C. Nail D. Hair Show Content Detailed Solution The following features is exactly what makes a mammal a mammal, and not a reptile, a bird or a fish: Hair, Middle Ear Bones, Sweat Glands, Temperature, Regulation It’s one of the features of mammals There is an explanation video available below.	D
85.	Examples of micronutrients include the following except A. vitamins A B. Vitamin B6 C. Biotin D. carbon Show Content Detailed Solution Carbon is a macro nutrient There is an explanation video available below.	D
86.	Etiolation is causes by the influence of A. Mineral Salts B. Water C. Carbondioxide D. Light Show Content Detailed Solution Etiolation is a process in flowering plants grown in partial or complete absence of light. It is characterized by long, weak stems; smaller leaves due to longer internodes; and a pale yellow color. There is an explanation video available below.	D
87.	Botany is also known as A. Phytology B. Phycology C. Pedology D. Plantophyta Show Content Detailed Solution Phytology is the branch of biology that studies plants. There is an explanation video available below.	A
88.	Name the blood cells in which nucleus is absent A. Lymphocytes B. Blood Platelets C. Monocytes D. Eosinophil Show Content Detailed Solution Like red cells, platelets (thrombocytes) have no nucleus. However, unlike red cells that originate in the marrow as nucleated cells and lose their nucleus, platelets are produced by budding off from a giant multinucleated marrow cell called a megakaryocyte. There is an explanation video available below.	B
89.	The damage to ozone layer is caused by A. Oxygen B. Nitrogen oxide C. Chlorofluorocarbons D. sulphur dioxide Show Content Detailed Solution Ozone sits in the upper atmosphere and absorbs ultraviolet radiaton, another type of solar energy that's harmful to humans, animals and plants. CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. There is an explanation video available below.	C
90.	Long neck in giraffe is used to illustrate the theory of A. Use and Disuse B. Origin of species C. Origin of life D. Natural selection Show Content Detailed Solution The giraffe’s long neck is a perfect adaptation to the animal’s natural habitat. Clearly the giraffe evolved this uncommon and helpful trait in order to reach those nourishing leaves. That’s how natural selection works. Use and disuse' theory in human life advocate the idea that animals acquired characteristics after using certain physical traits constantly. There is an explanation video available below.	A

81.	Swollen, bleeding gums are another common sign of which vitamin A. Vitamin K B. Vitamin B C. Vitamin C D. Vitamin D Show Content Detailed Solution vitamin C deficiency can occur as part of general under nutrition, but severe deficiency result into causing scurvy. Symptoms include fatigue, depression, and connective tissue defects (eg, gingivitis, petechiae, rash, internal bleeding, impaired wound healing). There is an explanation video available below.	C
82.	Double fertilisation is a unique features of A. Angiosperms B. Bryophytes C. Pteridophytes D. Algae Show Content Detailed Solution Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (mega gametophyte, also called the embryo sac) with two male gametes (sperm). There is an explanation video available below.	A
83.	The gland that is present close to Trachea A. Pancreas B. Liver C. Adrenal D. Thyroid Show Content Detailed Solution The thyroid gland, along with the esophagus, pharynx, and trachea, is found within the visceral compartment of the neck There is an explanation video available below.	D
84.	A distinguishing feature of mammals is the possession of A. Skin B. Scale C. Nail D. Hair Show Content Detailed Solution The following features is exactly what makes a mammal a mammal, and not a reptile, a bird or a fish: Hair, Middle Ear Bones, Sweat Glands, Temperature, Regulation It’s one of the features of mammals There is an explanation video available below.	D
85.	Examples of micronutrients include the following except A. vitamins A B. Vitamin B6 C. Biotin D. carbon Show Content Detailed Solution Carbon is a macro nutrient There is an explanation video available below.	D

86.	Etiolation is causes by the influence of A. Mineral Salts B. Water C. Carbondioxide D. Light Show Content Detailed Solution Etiolation is a process in flowering plants grown in partial or complete absence of light. It is characterized by long, weak stems; smaller leaves due to longer internodes; and a pale yellow color. There is an explanation video available below.	D
87.	Botany is also known as A. Phytology B. Phycology C. Pedology D. Plantophyta Show Content Detailed Solution Phytology is the branch of biology that studies plants. There is an explanation video available below.	A
88.	Name the blood cells in which nucleus is absent A. Lymphocytes B. Blood Platelets C. Monocytes D. Eosinophil Show Content Detailed Solution Like red cells, platelets (thrombocytes) have no nucleus. However, unlike red cells that originate in the marrow as nucleated cells and lose their nucleus, platelets are produced by budding off from a giant multinucleated marrow cell called a megakaryocyte. There is an explanation video available below.	B
89.	The damage to ozone layer is caused by A. Oxygen B. Nitrogen oxide C. Chlorofluorocarbons D. sulphur dioxide Show Content Detailed Solution Ozone sits in the upper atmosphere and absorbs ultraviolet radiaton, another type of solar energy that's harmful to humans, animals and plants. CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. There is an explanation video available below.	C
90.	Long neck in giraffe is used to illustrate the theory of A. Use and Disuse B. Origin of species C. Origin of life D. Natural selection Show Content Detailed Solution The giraffe’s long neck is a perfect adaptation to the animal’s natural habitat. Clearly the giraffe evolved this uncommon and helpful trait in order to reach those nourishing leaves. That’s how natural selection works. Use and disuse' theory in human life advocate the idea that animals acquired characteristics after using certain physical traits constantly. There is an explanation video available below.	A

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